[Scons-users] Rebuild issue with CheckLib()?

[Herzog, Tobias (G3-29)]

Python 3.5.3
SCons 4.1.0 (v4.1.0.post1.dc58c175da659d6c0bb3e049ba56fb42e77546cd)

Von: Scons-users <scons-users-bounces at scons.org> Im Auftrag von Bill Deegan
Gesendet: Mittwoch, 28. April 2021 17:45
An: SCons users mailing list <scons-users at scons.org>
Betreff: Re: [Scons-users] Rebuild issue with CheckLib()?

Which version of python?
Which version of SCons?

On Wed, Apr 28, 2021 at 1:00 AM Herzog, Tobias (G3-29) <tobias.herzog at carmeq.com<mailto:tobias.herzog at carmeq.com>> wrote:
Hi SCons-Users,

I discovered an issue (?) with missing rebuilds. It seems that rebuilds are not triggered, if the presence of an external lib is tested with the CheckLib Method.

I am using an SConstruct with the following content:

env = Environment(LIBPATH=['#mylib'])

conf = Configure(env)
if not conf.CheckLib('gtestd'):
    print('Error')
    Exit(1)
conf.Finish()

env.Append(LIBS=['gtestd'])
env.Program('test.cpp')

If you modify "mylib/gtestd.lib" (I am using MSVC compiler on Windows), no rebuild is triggered ("scons: `.' is up to date."). However the dependencies are detected correctly ("scons --tree=all"). Even with "-config=force" no rebuild is triggered. If I leave out the Configure section it works like expected.

Is this a bug or a feature? Maybe this is not a common use case, but I would expect a rebuild here.

Thanks,
Tobias
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